CN111711168B - Fault arc protection device - Google Patents
Fault arc protection device Download PDFInfo
- Publication number
- CN111711168B CN111711168B CN202010727990.4A CN202010727990A CN111711168B CN 111711168 B CN111711168 B CN 111711168B CN 202010727990 A CN202010727990 A CN 202010727990A CN 111711168 B CN111711168 B CN 111711168B
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- circuit
- protection device
- fault arc
- data
- fault
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- 238000005070 sampling Methods 0.000 claims abstract description 17
- 239000002184 metal Substances 0.000 claims abstract description 15
- 238000012545 processing Methods 0.000 claims abstract description 12
- 238000001514 detection method Methods 0.000 claims abstract description 11
- 238000007405 data analysis Methods 0.000 claims abstract description 7
- 238000000034 method Methods 0.000 claims abstract description 4
- 230000008569 process Effects 0.000 claims abstract description 4
- 238000012360 testing method Methods 0.000 claims description 29
- 238000004891 communication Methods 0.000 claims description 15
- 230000007246 mechanism Effects 0.000 claims description 10
- 238000006243 chemical reaction Methods 0.000 claims description 3
- 230000002159 abnormal effect Effects 0.000 claims description 2
- 238000010586 diagram Methods 0.000 description 3
- 230000007547 defect Effects 0.000 description 2
- 238000010891 electric arc Methods 0.000 description 2
- 230000006698 induction Effects 0.000 description 2
- 230000004075 alteration Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Classifications
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H3/00—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection
- H02H3/50—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection responsive to the appearance of abnormal wave forms, e.g. AC in DC installations
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R19/00—Arrangements for measuring currents or voltages or for indicating presence or sign thereof
- G01R19/165—Indicating that current or voltage is either above or below a predetermined value or within or outside a predetermined range of values
- G01R19/16566—Circuits and arrangements for comparing voltage or current with one or several thresholds and for indicating the result not covered by subgroups G01R19/16504, G01R19/16528, G01R19/16533
- G01R19/16571—Circuits and arrangements for comparing voltage or current with one or several thresholds and for indicating the result not covered by subgroups G01R19/16504, G01R19/16528, G01R19/16533 comparing AC or DC current with one threshold, e.g. load current, over-current, surge current or fault current
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R19/00—Arrangements for measuring currents or voltages or for indicating presence or sign thereof
- G01R19/25—Arrangements for measuring currents or voltages or for indicating presence or sign thereof using digital measurement techniques
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R19/00—Arrangements for measuring currents or voltages or for indicating presence or sign thereof
- G01R19/25—Arrangements for measuring currents or voltages or for indicating presence or sign thereof using digital measurement techniques
- G01R19/2506—Arrangements for conditioning or analysing measured signals, e.g. for indicating peak values ; Details concerning sampling, digitizing or waveform capturing
- G01R19/2509—Details concerning sampling, digitizing or waveform capturing
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/50—Testing of electric apparatus, lines, cables or components for short-circuits, continuity, leakage current or incorrect line connections
- G01R31/52—Testing for short-circuits, leakage current or ground faults
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Breakers (AREA)
- Testing Relating To Insulation (AREA)
Abstract
The invention provides a fault arc protection device, which comprises a control electronic circuit board, wherein the control electronic circuit board comprises: the arc detection device comprises a collected data amplifying circuit, an arc data analysis circuit, a data analysis program and a data instruction input/output circuit; the signal processing circuit processes the sampling signal to obtain a characteristic analog signal, and the characteristic analog signal is converted into a characteristic digital signal; acquiring the characteristic value signal, and judging whether fault arcs occur in a load circuit or not based on the data analysis program; the electric parameter acquisition sensor is a metal resistance sensor directly connected to the output load end of the main circuit to be tested in series; the metal resistance sensor comprises N series resistors, M parallel resistors and a resistance enabling controller, wherein the resistance enabling controller controls the M parallel resistors to be not communicated at the same time, so that full-band and full-frequency waveform data on an output load end of the tested main circuit are collected.
Description
Technical Field
The invention belongs to the technical field of electrical equipment, and particularly relates to a fault arc protection device.
Background
At present, the existing fault arc protection device mainly uses a current transformer as an arc waveform acquisition element, and because the arc waveform data acquired by the current transformer are limited by the current magnitude, current frequency, ambient temperature, volume, structure and the like, the acquired waveform data cannot contain all frequency and all current magnitude real-time data, so that waveform data of some fault arcs are omitted necessarily, and the fault arcs are generated without cutting off protection or electrical fire hazard, which is a great technical hidden trouble. This would indicate that the fault arc protection device that collects fault arc waveform data by simply using a current transformer cannot reliably protect people's lives and properties.
In addition, similar fault arc protection products in the current market are independent products and do not have program upgrading, so that novel arc waveform data generated by subsequent novel electric appliances cannot be monitored and protected. The potential hidden danger of electric fire disaster is brought to people, and life and property safety of people is threatened at any time.
Disclosure of Invention
In order to solve the above technical problems, the present invention provides a fault arc protection device, which includes a control electronic circuit board, the control electronic circuit board includes: the arc detection device comprises a collected data amplifying circuit, an arc data analysis circuit, a data analysis program and a data instruction input/output circuit; the acquisition data amplifying circuit comprises an electric parameter acquisition sensor, wherein the electric parameter acquisition sensor is connected with an output load end of a main circuit to be tested, the electric parameter acquisition sensor is connected with a signal sampling circuit, and the signal sampling circuit samples signals in the main circuit to be tested based on the electric parameter acquisition sensor; the signal sampling circuit is connected with the signal processing circuit, the signal processing circuit processes the sampled signals to obtain characteristic analog signals, and the analog characteristic signals are input to the microprocessor MCU module; converting the characteristic analog signals into characteristic digital signals through a digital-to-Analog (AD) processing unit of the microprocessor MCU; the arc data analysis circuit acquires the characteristic value signal and judges whether fault arcs occur in the load circuit based on the data analysis program; when judging that the fault circuit occurs, the data command input/output circuit outputs a corresponding signal command.
More specifically, as one of the contributions of the present invention to the prior art, in the present invention, the electrical parameter collecting sensor is a metal resistance sensor directly connected in series to the output load end of the main line under test;
The metal resistance sensor can be used for collecting waveform data of full wave band and full frequency on an output load end of the tested main line;
As a more specific key technical means for embodying the above-mentioned saliency contribution, the metal resistance sensor includes N series resistors, M parallel resistors, and a resistance enabling controller that controls the M parallel resistors to be not simultaneously connected at the same time.
The resistor enabling controller comprises a time sequence random number generator, the time sequence random number generator generates at least one positive integer value random number based on a sampling time sequence stored by the signal sampling circuit, and corresponding resistors in the M parallel resistors are controlled to be communicated based on the positive integer value random number, so that full-band and full-frequency waveform data acquisition on an output load end of the tested main line is realized.
In another aspect, the normal working state of the fault arc protection device can be monitored remotely through a remote communication function, so that the life and property safety of people can be protected by the fault arc protection device at any time;
Thus, as a further contribution of the present invention, the fault arc protection device further comprises a test device and a test button, allowing a user to check whether the function of the fault arc protection device is intact through the test button;
The test buttons independently form simulated fault arc current and leakage current, and a user only needs to operate the test buttons regularly, and if a protection reaction normally occurs, the fault arc protection device is in an effective working state; and a test instruction is sent through the wireless data communication module to check whether the function of the fault arc protection device is good.
In addition, compared with the defect that the prior art cannot monitor and protect the novel arc waveform data generated by the subsequent novel electric appliance without program upgrading, the technical scheme of the invention can also update and upgrade the firmware of the control electronic circuit board and the data analysis program through the wired data communication port.
Further advantages of the invention will be further elaborated in the description section of the embodiments in connection with the drawings.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings that are needed in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
FIG. 1 is an overall frame diagram of a fault arc protection device according to one embodiment of the present invention;
FIG. 2 is a schematic view of the internal structure of the device of FIG. 1;
FIG. 3 is a schematic diagram of a connection circuit for arc testing using the apparatus of FIG. 1;
fig. 4 is a further detailed diagram of the circuit of fig. 3.
The reference numerals in the drawings have the following meanings:
1. An operation handle; 2. an operating mechanism; 3. A test button; 4. a main contact; 5. a wire inlet wiring terminal; 6. overload protection device; 7. a short circuit protection device; 8. arc extinguishing device; 9. an electric shock and leakage detection device; 10. a load connection terminal; 11. an on-off state indication; 12. a function indication; 13. a control electronic circuit board; 14. a data communication port; 15. metal (shunt) sensors; 16. a plastic housing; 17. a plastic housing.
Detailed Description
The invention will be further described with reference to the drawings and detailed description.
As shown in fig. 1 and 2, a fault arc protection device includes: an operation handle 1; an operating mechanism 2; a test button 3; a main contact 4; a wire inlet wiring terminal 5; an overload protection device 6; a short-circuit protection device 7; an arc extinguishing device 8; an electric shock and electric leakage detection device 9; a load connection terminal 10; an on-off state indication 11; a function indication 12; a control electronic circuit board 13; a data communication port 14; a metal (shunt) sensor 15; a plastic housing 16; a plastic housing 17.
The operating handle 1, the operating mechanism 2, the main contact 4 and the arc extinguishing device 8 form an on-off mechanism of a main power-on circuit of the device, so that the manual connection and disconnection can be realized, and the triggering and disconnection functions of the mechanism can be realized.
Referring to fig. 1-2, the arc protection device of the present embodiment includes an external plastic protection member, a control electronic circuit board, an electrical parameter acquisition sensor, a short-circuit protection mechanism, a leakage detection and protection device, an overload protection device, an input-output wiring device, a main circuit on-and-off indication device, a test circuit test device, and an operating mechanism free tripping device.
The control electronics board includes: the device comprises a collected data amplifying circuit, an arc data analysis circuit, a data analysis program, a data command input/output circuit, a wired data communication port, a wireless data communication module and a working state indication circuit.
The fault arc protection device comprises a short-circuit protection device, an overload protection device and an electric shock and leakage detection device, wherein the short-circuit protection device is used for carrying out short-circuit safety protection, the overload protection device is used for carrying out overload safety protection, the control electronic circuit board is used for carrying out safety protection of fault arc, and the electric shock and leakage detection device is used for carrying out abnormal safety protection of an electric leakage and leakage circuit.
Further, the short-circuit protection mechanism, the electric leakage detection and protection device, the overload protection device, the input and output wiring device, the main circuit on and off indication device, the test loop testing device, the operating mechanism free tripping device and the like form a mechanical system with the functions of short circuit, overload, electric shock, electric leakage, wiring, operation and the like.
Further, the collected data amplifying circuit, the arc data analyzing circuit, the data analyzing program, the data command input/output circuit, the wired data communication port, the wireless data communication module, the working state indicating circuit and the like are integrated into the control electronic circuit board to form an electronic control system.
Further, the fault arc protection device described in this embodiment is formed by connecting the metal (shunt) sensor in the mechanical system, the collected arc waveform signal, to the electronic control system to form an assembly, and placing the assembly in the plastic protective housing.
The fault arc protection device also comprises a testing device and a testing button, so that a user can check whether the function of the fault arc protection device is good or not through the testing button;
The test buttons independently form simulated fault arc current and leakage current, and a user only needs to operate the test buttons regularly, and if protection reaction normally occurs, the fault arc protection device is in an effective working state.
And sending a test instruction through the wireless data communication module to check whether the function of the fault arc protection device is good.
Referring next to fig. 3, the collected data amplifying circuit includes an electrical parameter collecting sensor, the electrical parameter collecting sensor is connected to an output load end of the main circuit to be tested, the electrical parameter collecting sensor is connected to a signal sampling circuit, and the signal sampling circuit samples a signal in the main circuit to be tested based on the electrical parameter collecting sensor;
The signal sampling circuit is connected with the signal processing circuit, the signal processing circuit processes the sampled signals to obtain characteristic analog signals, and the analog characteristic signals are input to the microprocessor MCU module;
Converting the characteristic analog signals into characteristic digital signals through a digital-to-Analog (AD) processing unit of the microprocessor MCU;
The arc data analysis circuit acquires the characteristic value signal and judges whether fault arcs occur in the load circuit based on the data analysis program;
When judging that the fault circuit occurs, the data command input/output circuit outputs a corresponding signal command.
The metal (shunt) sensor 15 samples the signal in the main line under test. And carrying out special processing on the sampling signals to obtain characteristic analog signals, and converting the characteristic analog signals into characteristic digital signals through a digital-to-Analog (AD) processing unit of a micro processor Micro Control Unit (MCU). The digital signal is used for judging whether fault arc occurs in the load circuit through a complex algorithm between the microprocessor MCU and the arc detection module.
Such algorithms are well known in the art and are not developed in detail herein.
When a fault arc occurs, a corresponding signal is output. The control module provides an LED interface for LED output expression. The button interface, the key control is used for necessary operation control. GPIO [3:1] is an additional GPIO interface. Meanwhile, the module can provide an I2C interface and interfaces such as a universal asynchronous receiver transmitter UART and the like for communication, and can communicate with an external circuit or upload alarm information to monitoring equipment, so that fault arc fire can be effectively prevented.
Further reference is made to fig. 4, based on fig. 3. In this embodiment, the data acquisition mode of the electric arc adopts the mode that the electric arc is directly connected in series in the main detected line from the main circuit through a metal resistor (shunt) instead of the induction acquisition through a current transformer, so that the defects that the transformer is easy to saturate in current, inconsistent in high and low frequency induction, large in occupied space, easy to be affected by stress and the like are effectively avoided.
Specifically, the electrical parameter acquisition sensor is a metal resistance sensor directly connected to the output load end of the main circuit to be tested in series.
The metal resistance sensor comprises N series resistors, M parallel resistors and a resistance enabling controller, wherein the resistance enabling controller controls a corresponding enabling switch so that the M parallel resistors are not communicated at the same time.
The resistance enabling controller comprises a time sequence random number generator, wherein the time sequence random number generator generates at least one random number with a positive integer value based on a sampling time sequence stored by the signal sampling circuit, and controls corresponding resistors in the M parallel resistors to be connected or disconnected based on the random number with the positive integer value.
Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made therein without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (5)
1. A fault arc protection device comprising a control electronics board, characterized in that: the control electronics board includes: the device comprises a collected data amplifying circuit, an arc data analysis circuit, a data analysis program, a data command input/output circuit and a wired data communication port;
updating and upgrading the firmware of the control electronic circuit board and the data analysis program through the wired data communication port;
The acquisition data amplifying circuit comprises an electric parameter acquisition sensor, wherein the electric parameter acquisition sensor is connected with an output load end of a main circuit to be tested, the electric parameter acquisition sensor is connected with a signal sampling circuit, and the signal sampling circuit samples signals in the main circuit to be tested based on the electric parameter acquisition sensor;
the electric parameter acquisition sensor is a metal resistance sensor directly connected to the output load end of the main circuit to be tested in series;
The metal resistance sensor comprises N series resistors, M parallel resistors and a resistance enabling controller, and the resistance enabling controller controls the M parallel resistors to be not communicated at the same time;
The resistance enabling controller comprises a time sequence random number generator, wherein the time sequence random number generator generates at least one random number with a positive integer value based on a sampling time sequence stored by the signal sampling circuit, and controls corresponding resistors in the M parallel resistors to be communicated based on the random number with the positive integer value;
Acquiring waveform data of full wave band and full frequency on an output load end of the tested main circuit by using the metal resistance sensor;
the signal sampling circuit is connected with the signal processing circuit, the signal processing circuit processes the sampled signals to obtain characteristic analog signals, and the characteristic analog signals are input to the microprocessor MCU module;
Converting the characteristic analog signals into characteristic digital signals through a digital-to-Analog (AD) processing unit of the microprocessor MCU;
The arc data analysis circuit acquires the characteristic digital signal and judges whether fault arcs occur in the load circuit based on the data analysis program;
When judging that the fault circuit occurs, the data command input/output circuit outputs a corresponding signal command.
2. A fault arc protection device as claimed in claim 1, wherein: the fault arc protection device comprises a short-circuit protection device, an overload protection device and an electric shock and leakage detection device, wherein the short-circuit protection device is used for carrying out short-circuit safety protection, the overload protection device is used for carrying out overload safety protection, the control electronic circuit board is used for carrying out safety protection of fault arc, and the electric shock and leakage detection device is used for carrying out abnormal safety protection of an electric leakage and leakage circuit.
3. A fault arc protection device as claimed in claim 1 or claim 2, wherein: the fault arc protection device also comprises an external plastic protection piece, an input and output wiring device, a main circuit on-off indicating device, a test loop testing device and an operating mechanism free tripping device;
the control electronic circuit board also comprises a wireless data communication module and a working state indicating circuit.
4. A fault arc protection device as claimed in claim 1, wherein: the fault arc protection device also comprises a testing device and a testing button, so that a user can check whether the function of the fault arc protection device is good or not through the testing button;
The test buttons independently form simulated fault arc current and leakage current, and a user only needs to operate the test buttons regularly, and if protection reaction normally occurs, the fault arc protection device is in an effective working state.
5. A fault arc protection device as claimed in claim 3, wherein: and sending a test instruction through the wireless data communication module to check whether the function of the fault arc protection device is good.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010727990.4A CN111711168B (en) | 2020-07-27 | 2020-07-27 | Fault arc protection device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010727990.4A CN111711168B (en) | 2020-07-27 | 2020-07-27 | Fault arc protection device |
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| Publication Number | Publication Date |
|---|---|
| CN111711168A CN111711168A (en) | 2020-09-25 |
| CN111711168B true CN111711168B (en) | 2024-07-23 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202010727990.4A Active CN111711168B (en) | 2020-07-27 | 2020-07-27 | Fault arc protection device |
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Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN212627137U (en) * | 2020-07-27 | 2021-02-26 | 杭州欧德朗智能科技有限公司 | Fault arc protection device |
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2020
- 2020-07-27 CN CN202010727990.4A patent/CN111711168B/en active Active
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN212627137U (en) * | 2020-07-27 | 2021-02-26 | 杭州欧德朗智能科技有限公司 | Fault arc protection device |
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| Publication number | Publication date |
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| CN111711168A (en) | 2020-09-25 |
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